Tickets for the Manchester United vs. Real Madrid soccer game at Michigan Stadium don’t go on sale to the general public until Thursday, April 10.

There might not be any left by then.

The University of Michigan gave its season ticket holders and donors first crack at purchasing tickets Monday morning at 8:30 a.m. Anyone who had signed up for a pre-sale promotion on the Guinness International Champions Cup website could buy tickets for the August 2 game then as well.

Tuesday morning, tickets became available to the Michigan Athletics “digital community” and student-athlete alumni, and before noon the Michigan Ticket Office had announced that there were no longer any side-by-side tickets available. Customers can buy as many as 50 tickets at a time.

A recording at the Michigan Ticket Office phone line said there were only “scattered singles” available around 11 a.m. and by 1 p.m. the office wasn’t accepting calls due to high-caller volume. Michigan football season ticket renewals are currently going on as well and the University announced its October 11 game vs. Penn State would be a night game.

Face value for the soccer tickets ranged in price from $45-$189, but as of 1 p.m. Tuesday the cheapest ticket available through the Michigan Ticket Office website was $150.

Michigan Stadium has an official capacity of 109,901 for football games, but tournament organizers have not disclosed exactly how many tickets would be available for the soccer game. Relevent Sports CEO Charlie Stillitano said Friday that he expects the capacity will be close to that of a football game, though some seats may be lost to sitting the teams in the stands to maximize the field width for the game. Michigan athletic director Dave Brandon did say the plan was to sell enough tickets to potentially break the United States record for attendance at a soccer game, which is 101,799.

Tournament organizers have not said exactly how many tickets have been sold so far. The Michigan Ticket Office tweeted that tickets would not be held for when sales open to the general public Thursday, but promotional codes to access the pre-sale online have not been hard to come by on the Internet. The Michigan Ticket Office even Tweeted one (SOCCER) Tuesday.

As of 1 p.m. Tuesday, 2,280 tickets were available on Stub Hub ranging in price from $87-$1,659.40.